Go to a document the user can translate, open in editor
Open the side menu
Uncheck "Display optional Trans Unit Details"
The 'Details' and 'Link' button are hidden
A recent update changed the details panel to a details button, I think it may have broken at this point.
Release test 4.0 6fb744a5b93200ee1f15fb9d651c593f53b08190
Chrome Version 54.0.2840.100 (64-bit)
Verified in RC2